using System;

using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Math;

namespace Org.BouncyCastle.Asn1.Pkcs
{
	/**
	 * the infamous Pfx from Pkcs12
	 */
	public class Pfx
		: Asn1Encodable
	{
		private ContentInfo	contentInfo;
		private MacData		macData;

		public Pfx(
			Asn1Sequence seq)
		{
			BigInteger version = ((DerInteger) seq[0]).Value;
			if (version.IntValue != 3)
			{
				throw new ArgumentException("wrong version for PFX PDU");
			}

			contentInfo = ContentInfo.GetInstance(seq[1]);

			if (seq.Count == 3)
			{
				macData = MacData.GetInstance(seq[2]);
			}
		}

		public Pfx(
			ContentInfo	contentInfo,
			MacData		macData)
		{
			this.contentInfo = contentInfo;
			this.macData = macData;
		}

		public ContentInfo AuthSafe
		{
			get { return contentInfo; }
		}

		public MacData MacData
		{
			get { return macData; }
		}

		public override Asn1Object ToAsn1Object()
		{
			Asn1EncodableVector v = new Asn1EncodableVector(
				new DerInteger(3), contentInfo);

			if (macData != null)
			{
				v.Add(macData);
			}

			return new BerSequence(v);
		}
	}
}
